161506627 has 2 divisors, whose sum is σ = 161506628. Its totient is φ = 161506626.

The previous prime is 161506607. The next prime is 161506633. The reversal of 161506627 is 726605161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161506627 - 2¹⁵ = 161473859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161506592 and 161506601.

It is not a weakly prime, because it can be changed into another prime (161506607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80753313 + 80753314.

It is an arithmetic number, because the mean of its divisors is an integer number (80753314).

Almost surely, 2^161506627 is an apocalyptic number.

161506627 is a deficient number, since it is larger than the sum of its proper divisors (1).

161506627 is an equidigital number, since it uses as much as digits as its factorization.

161506627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 161506627 is about 12708.5257602918. The cubic root of 161506627 is about 544.5822087753.

The spelling of 161506627 in words is "one hundred sixty-one million, five hundred six thousand, six hundred twenty-seven".